Device for operating elevator trap doors



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(No Model.)

A. G. PAGE.

DEVICE FOR OPERATING ELEVATOR TRAP DOORS.

Rat ented Dec. 13, 1887.

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(No Model.)

Patented Dec. 13, 1887.

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i UNITED STATES ALBERT G. PAGE, SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO THE PAGE AUTOMATIC FIRE SHUTTER COMPANY, OF CALIFORNIA.

DEVICE FOR OPERATING ELEVATOR TRAP-DOORSf SPECIFICATION forming part of Letters Patent No. 374,693. dated December 13, 1887.

Application filed April 25, 1887.

To all whom it may concern;

Be it known that l, ALBERT G. PAGE,acitizen of the United States of America, and a resident of the city and county of San Francisco, State of California, have invented a new and useful Improvement in Elevator Trap- Door-Operating Devices, of which the following is a full, clear, and exact description.

' My invention relates to devices for autoro matically opening and closing the fire-proof trap-doors of elevator-wells, the object of my invention being to provide'mechanism actuated by the elevator and operating to open and close, and also unlock and lock, the trapdoors I 5 when the elevator is ascending and descendlug.

To thc above purposes my invention consists in the peculiar and novel features of construction and arrangement hereinafter describedand claimed.

In order that my invention may be fully understood, I will proceed to describe it with reference to the accompanying drawings, in whichv Figure 1 is a perspective View of an elevator-well and elevator with my improvements applied thereto, one set of the doors being.

closed. Fig. 2 is a similar view of the same, showing one set of the doors open. Fig. 3

illustrates the arrangement of the operative mechanism as it appears when viewed from outside of the well. Fig. 4 is a view of the same when looked at from within the well. Figs. 5 and 6 illustrate the locking devices in the positions they assume when the doors are closed and open, respectively. Figs. 7 to 14 illustrate certain details of construction to be hereinafter referred to.

In the said drawings, D designates the car,

which is shown as of the ordinary platform style, but which may be the cage or of any other similar or preferred style, and which may be raised and lowered by any suitable mechanism, as circumstances may suggest.

5 A designates the uprights or guides for the elevator, and B O designate the hinged trapdoors, preferably of iron or other suitable fireproof material. Upon the sides of the car are mounted rollers 1, which, as the car ascends 5c and descends, come into engagement with the Serial No. 236,132. (No model.)

forked arms 2 3, for operating the doors B C, as hereinafter particularly explained.

E designates V-shaped metal plates which are secured to the sides of the well, and4 designates triangular plates which are secured to the ends of thetrap-doors and extend down: wardly therefrom. To these plates 4 are pivoted at 5 the upper ends of connecting-bars 6, which at points 7 are pivoted to the plates E.

The lower ends of the bars 6extend consider- 6o ably below the pivotal points 7, and carry balance-weights 8, which tend to retain said bars in their normal pendent position. Upon the bars 6 are secured inwardly-extending arms-9,

for a purpose to be hereinafter explained. 10 designates bars which are pivoted at points 14 to the plates E, and which extend downward and inward from said plates, as

shown. These bars 10 are preferably each composed of two sections, a I), (see Figs. 7 and 8,)

so as to render said bars adjustable in length. The section a is formed on one edge with notches 17, which are engaged by a piu,'18, projecting from a contiguous part of the section b. Slots20 on each section receive screws 21 thereon in such manner as to retain the sections at any required point of relative adj ustment. The lower ends of the sections a of the bars 10 are reduced in curved form, as shown at 19, and the corresponding upper ends of So the sectionsb are provided with pins 19, which come into contact with the curved portions 19, and thus retain the sections in alignment when the trap-doors are in closed position. The lower ends of the bars 10 are pivotally secured 8 5 to the elongated plates 16, near one end thereof, and upon said plates,uear the points of connection of the bars 10, are secured adjustingplates 22. Each of the plates 22 is slotted to receive the upper end of a connecting-rod, 23, c the lower end of which is pivotally connected at the outer side of one of the uprights A. Upon a plate, 30, which is secured to the upright A, is pivoted at 29 a fork, 3, similar to the fork 2 above described, and the outer por- 5 tion of this fork 3 is pivotally connected at 28 by a link, 26, to the plate 25 at 27.

31 designates an elongated plate which is secured in vertical position upon the outer side of the upright A, and serves to properly se- 1 oo cure the swinging plate and permit it to rise and fall as thedoors are opened and closed. The upper fork, 2, is elongated, as shown,and a link, 32, connects the extended end 33 of the fork to the plate 25 at the point 24.

35 designates a bar which is hinged at 35 to the bar 31, and which carries at its upper portion a stopblock, 36, and at its lower portion an arm, 37.

38 designates a curved lever which is pivoted at 39 upon the post A. The block 36 works through a suitable slot in the arm 31, and serves to lock said arm against upward movement. I

As the car ascends, its roller 1 enters the forked end of 16"3I 3 and throws said lever upward, thereby lowering the hinged doorsB C through the action of the connecting-rods 6 1O 23 and plate 25 and their intermediate connections. At the same time the side of the car, striking the lever 38 at 40, throws the stop outward and locks the doors. In the further ascent of the-elevator the roller 1 first strikes the fork 2,and raises the doors on their hinges and closes them. When the elevator descends, the fork 2 is thrown down, opening the doors. The fork 3, being now turned upward, is engaged and thrown down, thus againclosing the doors.

To the trap-door B andO are suitably connected iantirfrictionrollers 41, which serve ,to

prevent stoppage of the operation of the trapdoors should they strike against the sides of the elevator-well, and for the same purpose anti-friction rollers 42 are mounted upon the sides of the well, as shown.

Having thus described my invention, what I claim as new, and desire'to secure by Letters Patent, is-

1. The combination, with the hinged doors and the elevator, of the bar 35, having the stop 36 and arm 37, and the lever 38,substantially as and for the purpose described.

2. The combination, with the elevator-well, of the plates 31, bars 35, stopblock 36, arms 37, levers 38, plates 25, connecting-bars 26, forks 2 and 3, connectingbars 23 32, plateslf}, adjusting plates 22, adjustable connectingbars 10,composed of the sections a b, the bars 12, connecting-bars 6, arms 9, and 9 6 E, y

substantially as and for the purpose set forth.

3. The combination, with the trap- 0 B 0, having the rollers 1, of the forks 3, connecting-bars 32, plates25, levers 16, a p a E, with bars 6 10, substantially as and for t e purpose described.

ALBERT e. PAGE. '[L.

\Vitnesses:

FERDINAND IMHORST, CHARLESF. GOMPERTZ, A PHoNso B. SM TH. 

